Apparatus for flushing foreign matter from bearings



D. G. ROOS APPARATUS FOR FLUSHING FOREIGN MATTER FROM BEARINGS Filed Jne 17,' 1943 2 Sheets-Sheet l 6 H Y A M k I. mm Q\ mE w m M ms Rmx N V o x E um m f n T /m e v\ E y W. g B www, Nv w R. Nm Aw w wk il @u ||||w O R, Wx w l" .HN xm Q m. Q kx April 6, 1948.l D. G. Roo 2,439,187

APPARATUS FOR FLUSHING FOREIGN MATTER FROM BEARINGS Filed June 17, 1945 2 Sheets-Sheet 2 IN VEN TOR. e/rf ar 6.' /Eo 05 BY Patented Apr. 6, 1948 `"APPARATUS#FOR FLUSHING FOREIGN MAT-TER FROM BEARINGS iDelmartG.f-.Roos,iToledo, Ohio,.assignor .to lWillysvOverlandMotora Inc., Toledo, `l1io,.a corporationofDelaWare Application .11111617 1943,1Se1ial No. `l`49122.42

.8 Claims.

.Q'Ihis finvention irelates rto :an .apparatus for iushingorremoving.chipsandntherioreignm-atter from bearings of; mechanisms.

' The: inventioni embracesithemrovisionnfimeans for `efiectingfzthe :removalrof foreign lmatter from bearings ofimechanisms" .Whiletin .operation Without materially .affecting sthe lubrication ,of 4such ibearings.

The invention contemplates "the fprovisi'on Tof apparatus for .iiushing :chips and iforeign matter .from lbearings of crankshaits vwherein l a .system .of pressurelubricationfis utilized `for lubricating :such `bearings An object of theiinventionristhe@provision of -a -simple `yet .effective *arrangement .Whereoy a l'lubrication duct for a "bearing fstructure maybe `periodically .vented lto effectla-removalv of .foreign matter ffrom'thebearing.

lAnotheroloject of fthe inventionresides in `an arrari-gement whereby-a -lubricant conveyingrk duct in-a-cranfkshaft olf -aniengine orlthe like which =forms-a-component part-'of-a system of pressure ilubrication tothe bearingfis yperiodically `relieved of llubrication pressure -'during.rotation ofcrankshaft to ifacilitateithe us'hing ffromlthe ductrof chips, dirt and other 7foreign matter from the bearing.

JStill lanother #object is 'the provision of -n1eans `of `flushing Iforeign #matter ffrom hearings dur-ing `oiirerationof Vthe-mechanism which may lice incorporated lin -engines or the like by 4modifying the `bearings'andlbearingsupports.

Further 'obj ects and advantages f are -wthin the :scope'nf thislinventicn `such'asrelate to the arrangement;operation-andtfunotionof the related elements of the structure, to va'rpusdetails of construction 'and to `combinations `of parts, elements pense, andfto economies of manufacture "and numerous ether lfeatures'ras Will be apparent from Aa rconsideration 'of 'the 'specification and "drawing rof a form of the linven'tion, which may lhejpreerred in which:

Figiue Iis a-sideielevationalview of aportion "of an irrternal combustion engine certain parts vbeing shownin section;

Fgure'Zis a vertical sectionalview takenhsub- 'stantially on 4the line '2-2 of *Figure 1';

,'Figure 3 is-a transverse se'ct'ronal'vi'ew through one of the crankshaft bearings illustrating 4the VAdetailsro'i'a -forrn 4of my invention;

'Figure `e iis la perspective View of a .hearing -means dand `support ithe're'f'or 'Y showing :a fcrm of venting vmeans `of 'the invention;

:Figure is :a horizontal sectional o/ievv` taken substantially :on the i line v5-C5 of LEigure 3, .and

:Figure 6 is a `View;illu stratirigra portion of ethe structure of VFigura-3 showing the crankshaft duct in vented position;

'Figure `'I :is4 a f sectional' view @through -af crankshaft bearing illustratingaamodied ronnof my invention.

While I have v:illustrated my inventonias' incorporated 'ins an :enginef;ofthe;internal lcombustion typegit is r,to tbe understood `that EI vicontem- `plate theuse :onmylinventionfwith anymecha- .nism Awherein 'the :same r'nay :be Jfound to rhave utility. A

Referring lto the :drawings in `Sdetailthe. engine Vconstruction illustratediistnclusive of a cylinder is connectedbymeansfofzconnectingirods i4with -pistons il E whicharea-arranged ffor reciprocating movement inf'cy'lindersll'i. *Atwater jaeketlis provided adjacent Sthefcylin'ders @to facilitate `fremoval of excess heat frcmfthe=eng'ine, lawater pump `Toeing enclosed Within Va ffliousing t20 and driven byfa belt 2l fthrough pulley-s *22 and 323 serves @to effectively circulatel {theico'ling water. A fan25 also "drivenbyafbeltfl servesto'establish a oircu1ation-`o`f `air throughaaJ Watercooling radiator (notfshown). t

Positioned beneath *the cylinder *llock l il` s"is a crankcase orreceptaole 28 Whichiissecuredto the cylinder block icy-means'of bolts 29, the crankcase `serving as an oil or lubricant'reservoiradapt ed to contain a substantialwguantity of oil for lubricating the `engine *in "a Vmanner Eto be hereinafter set forth.

The crankshaft I 2 tissupportedn the 4'cylinder block by me ans of' I:a rp'lurality 'orspaced Jbearing constru ations;` tWoof"whihiareillustrated 1in Figure 1. Each bearing arrangement'isinclusive of a portion '3D preferably .integrally "cast 'with the cylinder block and Whichv is arrangedtocooperate vwith bearingcaps orLsupportsl "which 'arcsecured to portions 30 :by'means of cap iserewsz, the threaded ends 'dfmthe .cap screws extending into threaded openings .'formed" in the portions 38. 'The crankshaft IZ-cis fabricated itfithliourn'al portions 3,5and 3.6 Whichnre `eaixh mounted .in rbearings 3l-38 .and 31 '-l38f. Each. set'of ,bearings are `for-ined in shalves, -the upper lllalvesl .and -31 engaging in eseiniscylindrioal recesses o formed in the `portions 30V-of athe* cylinder @block while the lower vbearinghalves138 fand 38'=are mounted -in semi-:cylindrical configurations formed in the bearingaeapsil :Thea-upper bear block i l 9,.. cylinderhead l l l ,sa-.crankshaft TF2 which bracket supported by the cylinder block eX-` tends into the crankcase 28 and pivotally carried at its lower extremity is a floating type oil filter 52. Oil or lubricant is drawn by the pump through the inlet channel 53 leading from the lter 52 to the pump, the latter discharging through channels 51 and 58 to a duct 68 extending longitudinally of the cylinder block as shown in Figures 2 and 3. The duct 60 is in communication with ducts or channels 6| and 62 whichconvey oil to the journals 35 of the crankshaft, the upper bearing halves 31 and 31 each being formed with ann opening 63 to permit the flow of oil'to the'interior bearing surface as shown in Figure 3, Y 1

Each ofthe upper bearing members 31 and 31 is formed with a lubricant conveying channel or groove 66 and each lower bearing member 38 is formed with a channel 61 one end of the latter channel being. in registration with the channel |56 of the upper bearing member. As particularly illustrated inFigures 3 and 4, the channel 61 does not extend entirely around the bearing but terminates at a point indicated at 68. Arranged above and spaced from the terminus68 of the'groove 61 is a laterally extending opening V1|| in the bearing which is in registration withY an openingv 1| drilled or bored transversely in thebearing cap 3|. The opening in the bearing cap which admits one of the cap screwsi32 is counterbored or enlarged as at 13. VThe openings 10 in bearing halves 38 and 38', the transverse bores 1| inthe bearing caps an-d the counterbores 13 form vents or passage- Ways from the interior` of the bearing surfaces to the exterior ofthe bearing caps. Thus the vents are at atmospheric pressure.

The pistons I6 are connected through the rods I4 with crankpins 15 of the crankshaft through suitable bearings-16 as particularly shown in Figure l. These connecting rod bearings 16 receive lubrication from the grooves or ducts 66 andl 61 in .the main crankshaft bearings through the provision of ducts or channels 18 drilledV in the arms of the crankshaft. As particularly shown in Figure 3 the `duct 18 terminates centrally inthe main bearing journal and is adapted during rotation of the vcrankshaft to communicate or register with grooves 66 and 61 in the crankshaft bearings. Through this arrangement the oil inthe grooves 66 and 61 is under pressure provided by the oil pump, which pressure kis impressed upon oil in the duct 18 so that the oil is fed to the connectingvrod bearings throughout the majorV period of rotation of the crankshaft, i. eas long as duct 18 is in communicationl with grooves 66 and 61. shaft has Areached the position during rotation where the extremity of duct 18 is opposite the bearing surface or land indicated at 80, the duct Y 18 "is out of communication with the groove 61 in bearing half 38 and due to the clockwise ro- When the cranktation of the crankshaft as Viewed in Figure 3, f

chips, dirt and other foreign matter tend to be carried bythe oil circumferentially in the groove 61 and accumulate or lodge in the extremity of the duct 18. Theland acts as a valve to sever oil pressure communication with the duct 18. Upon further rotation of the crankshaft the extremity of duct 18 passes over the land 88- and registers with the opening 18 in the bearing half 38 as shown in Figure 6 so that the duct 18 is momentarily vented to the atmosphere through the medium of openings 10 and 1| and the counterbore 13. As the duct 18 in this position is not subjected to the pressure from the oil pump, and under the influence of centrifugal force of the rotating crankshaft about its axis, a. small amount of oil and foreign matter accumulated in the extremity of duct 18 are thrown outwardly through the vent openings 18--1I-13 away from theV surface of the bearing half 38. By this means any chips or foreign matter collected in the/ extremity of the duct 18 are extruded through the vent openings 10 and 1| and counterbore 13, passing to the exterior of the bearing cap 3| falling into the crankcase or sump 28. The chips and foreign matter drop to the bottom of the crankcase 28 and hence are out of the path of the circulating oil.

Further slight rotation of the crankshaft moves the duct 18 out of registration with the vent and re-'establishes communication of the duct with groove 66 in bearing 31 so that oil Ypressure is effective on duct 18 to convey lubricant to the connecting rod bearings. f

The journal 36 of the crankshaft carried in bearinghalves 31 and 38 is similar to journal 35 except that two ducts 18 convey oil tothe connecting rods arranged adjacent each side of the journalbearing construction. Y Y

Through this arrangement as above described I have provided an inexpensive yet very Yeffective apparatus for flushing any accumulation .of chips, dirt or other foreign matter through the vent openings 'during each revolution of the crankshaft, this ushing action proceeding continuously during the operation of the engine or mechanism. I have'found that the scoring of bearings due to the presence of foreign matter in the circulating oil is practically eliminated by the present invention and hence, the life of the bearings greatly increased.

The bearing half 38 being at the forward end of the engine is provided with a narrowVgr-oove in which oil may accumulate and passv throughV a duct 86 to lubricate the timing chain (not shown) which serves to drive the cam shaft 49.

In the form of the invention as above described, the vent is arranged Alaterally as this point on the bearing is most remote from the source of oil pressure and therefore of lowest pressure existing in the bearing.

Figure '1 illustrates a modified form of my in- Y vention wherein the lower bearing half 38". is

provided with an opening 86 registering withI an opening 9| vertically arranged in the main bearing cap 3|', these openings forming a venting means. The bearing half 38" is formed with grooves 61 which terminate at points 68', The lubricant is fed to groove 66 in the upper bearing member 31 through the duct 6| and 62'.

In this form of th'e invention the duct 18' throughout the major portion of rotation of the A Bil serving as a valve to close the duct 13' and sever this oil pressure connection. Upon further slight rotation of the crankshaft, the duct 18' registers With the vent formed by openings 99 and 9i in the bearing member and cap respectively so that any accumulation of dirt or foreign matter collected in the terminus of duct 18 will be discharged from the duct into the vent. A small amount of lubricant is discharged with each venting cycle but upon further slight rotation of the crankshaft, the duct 78' is again brought into communication with the groove 6? and oil pressure reestablished in the duct for conveyance to the connecting rod crankpin bearing in communication With duct 'I3'.

It is apparent that Within the scope of the invention, modifications and different arrangements may be made other than is herein disclosed, and the present disclosure is illustrative merely, the invention comprehending all variations thereof.

What I claim is:

1. In combination; av crankshaft having a journal, a bearing; a connecting rod connected to said crankshaft; a bearing for connecting said connecting rod to the crankshaft; a groove in said crankshaft journal bearing extending throughout a portion of the circumference of said bearing; means connecting said groove with a supply of lubricant; a duct in said crankshaft having one end in normal communication with the groove in said journal bearing, said duct arranged to convey lubricant to the connecting rod bearing; a vent opening arranged in the nongrooved portion of said journal bearing in circumferential alignment with the groove therein, said duct being arranged to register with said vent opening during each revolution of the crankshaft.

2. In combination; a crankshaft having a journal bearing; a bearing cap for securing said journal bearing in position, said bearing having a groove extending throughout a major portion circumferentially thereof; an opening formed in the Wall of the ungrooved portion of said bearing and lying in the plane of the groove therein; said bearing cap having an opening in registration with the opening in said bearing, a lubricating duct in said crankshaft and having one end normally in registration with the groove in said bearing whereby oil in said groove is conveyed to said duct; said duct being arranged to register i with the opening in said bearing and bearing cap during each revolution of the crankshaft for venting said duct to the atmosphere.

3. In combination; a journal bearing having a lubricant channel extending throughout a major portion circumferentially thereof, said bearing having an opening through the wall thereof in circumferential alignment with the lubricant channel and in the non-channelled portion of the bearing, a cap supporting said bearing, said cap having spaced openings to receive bolts for securing said cap in position, one of the openings in said cap having a counterbore, and la transversely arranged opening in said cap in registration with the counterbore and the opening in the Wall of said bearing forming a vent for said bearing,

4. In combination; a journal bearing formed of two semi-cylindrical elements, a groove extending circumferentially throughout the inner surface of one of said elements, a groove extending circumferentially throughout a portion of the inner surface of the other `element, a vent opening through the Wall of latter element in the ungrooved portion thereof and arranged in the plane of the groove formed in said element; and a bearing support for said bearing having an opening therethrough in registration With the vent opening in said element.

5. In combination; a crankshaft having a journal; a bearing therefor having a lubricant channel therein for conveying lubricant to said journal; said crankshaft having a lcrankpin; a connecting rod bearing therefor; a duct for conveying lubricant from said journal bearing to said connecting rod bearing; said duct being arranged for periodic communication with said channel during rotation of said journal; and means for venting the entrance to said dtlct when the safme is out of communication with said channel.

6. In combination; a crankshaft having a journal; a bearing therefor having a lubricant channel therein for conveying lubricant to said journal; said bearing having a vent opening out of communication with said channel; and a Alubricant conveying duct in said journal arranged for successive communication with said channel and vent opening during each rotation of said journal.

'7. In an oiling system for bearings, a journal; a bearing therefor wherein oil is fed to the bearing under ,pressure; said bearing having a vent to the atmosphere; said journal having an oil duct therein normally containing oil under pressure; said oil duct and vent being so arranged that druring each revolution of the journal the entrance of said duct and vent in the bearing are brought into registration whereby foreign vmaterial in the duct rmay pass through said vent and out of said bearing.

8. In combination, a crankshaft; a journal bearing therefor; a connecting rod connected to said crankshaft; a bearing therefor; means including a pair of channels normally in intercommunication throughout a major portion of a revolution of said crankshaft for conveying oil under pressure to said crankshaft journal and connecting rod bearings; a vent for one of said channels arranged to register therewith at least once during each revolution of said crankshaft; said channel being in registration with said vent when said vented channel is out of communication with the other of said channels.

DELMAR G. ROOS.

, REFERENCES CITED The following references are of record in the ille of this patent:

UNITED `STATTS PATENTS Number Name Date 1,291,839 Gorham Jan. 21, 1919 1,872,194 Summers Aug. 16, 1932 1,948,340 Dolza Febf 20, 1934 

